US PATENT SUBCLASS 508 / 304
.~.~ Oxygen-containing hetero ring (e.g., allyl glycidyl ether, etc.)

Current as of: June, 1999
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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
243  DF  .~ Heterocyclic ring compound; a heterocyclic ring is one having as ring members only carbon and at least one hetero atom selected from nitrogen and chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) {4}
304.~.~ Oxygen-containing hetero ring (e.g., allyl glycidyl ether, etc.) {2}
305  DF  .~.~.~> Chalcogen double bonded directly to a ring carbon of the hetero ring which is adjacent to a ring oxygen (e.g., lactones, etc.) {1}
307  DF  .~.~.~> The hetero ring contains at least five ring members (e.g., 1,3-dioxane, furan, etc.) {1}

DEFINITION

Classification: 508/304

Oxygen containing hetero ring (e.g., allyl glycidyl ether, etc.):

(under subclass 243) Compositions wherein oxygen and carbon are ring members of the hetero ring.

(1) Note. An example of a component provided for herein is [figure]